Well testing



Patentedl Mar. 1, 1932 `UNi'rED STATES PATENT? OFFICE EDWARD HERBERTMCHARDIE, F SAN J' OSE, AND NATHAN' T.BRA.DFORD, OF Tm BELLA, CALIFORNIA7 WELL TESTING Application filed January 6, 1930. Serial No. 418,919.

rIhis invention relates particularly to a means and method of samplingthe liquid content of the several strata through which the well is beingdriven.

It is one object of the invention to provide a method whereby samples ofliquid from a given stratum may be obtained without becomingcontaminated by an admixture of liquid from an overlying stratum.

It is another object of the invention to provide a method whereby theliquid content of any given stratum may be obtained as the boring of thewell progresses and Without becoming contaminated by an admixture ofliquid from overlying or underlying strata.

It is also an object of the invention to provide a means for sealing offthe lowermost portion of the well from the upper portion and means forextracting liquid from the sealed off portion without permitting itsadmixture with liquid in the said upper portion of the well.

It is still a further object to provide a means for Washing out thesealed olf portion of the well independently of the upper portion.

In the drawings:

Figure 1 is a sectional view of one embodi ment of the inventionpositioned in a well,

. parts broken away.

Figure 2 is a section on line 2 2 of Figure l.

Figure 3 is a section on line 3-3 of Figure l.

In the embodiment of the invention as herein disclosed we show at 1 abore of any suitable size and depth such as commonly made when boringfor water. It being assumed that it is desired to secure a sample of thewater immediately below the bottom of this bore, the procedure is asfollows:

IVe provide a casing of somewhat less Idiameter than the bore 1 as shownat 2, and on the lower end of this casing is mounted a head 3. The head3 has an orifice 4 formed in the center thereof controlled by a flapvalve as 5. Concentrically mounted on the head 3 and within casing 2 andspaced a distance therefrom is a second casing 6, both casings passingupwardly to the top of the well, the

sections being connected by bearing members as 7'.v The bearing membersand the head are provided with conduits as 8 and 9 respectively so thatwater may be fed downwardly between the casings and through the head 3.In the casing 6 is mounted a lift pump 10, its valve being indicated at11.v

The bottom of head 3 has a centrally disposed threaded recess formedtherein as at 12, and around the edge of the recess is formed a channel13.

At 14 we show a complementary head portion havingthreaded engagementvwith portion 3 as at 15, the upper and outer edge 16 aligning with theopposing edge of the head` portion 3, and the outer surface of theportion 14 curving inwardly and downwardly as at 17 to form an annularcurved seat for the purpose hereinafter set forth. In the bottom of part14 is mounted a perforated casing as 18, this casing beingconcentrically disposed relative to the axis of revolution of the member14 and having a diameter substantially less than that of the member 14at its widest part. Mounted upon the lower end of the casing 18 is ahead member 19 having an orifice 20 formed therein and carrying a drill21 which also has a passage 22 formed therethrough to ali with theorifice 20. A conduit 23 is seate in the head members 14 and 19 andwithin the casing 18 to form a continuation of the conduit 20-22, thisconduit vcommunicating with the channel by means of conduits 24, so thatwater fed down through conduits 9 will flow through the conduits23-22-20 and into the Well. In the upper surface of part 14 is formed apocket 25 communicating with the orifice 4, and at 26 are conduitsconnecting the pocket 25 with the chamber between conduit 23 andperforated casing 18.

By means of the foregoing construction water may be fed into the bottomof the well during .the final drilling and cleaning operation withoutmixing it with Water from the overlying strata, and a discharge line isprovided that is completely closed olf from the Well and the feed line,through the use of a hollow pump rod 28.

Assuming that the bore 1 has been driven to some depth and it is desiredto secure a sample of the water in the stratum immediatemounted on thecon on one side of said head, and drilling means duits on the other side1y below before the bore is carried thereof the head.

through, the procedure is as follows.

The structure 2--26 having been assembled as hereinbefore described thedrill 21 is put to work to form the bore 27 of less diameter than thebore 1. This operation is continued until the head portion 14 reachesthe beginning of the smaller bore where its rotary movement causes it toform a shoulder 29 and to seat itself tightly thereon in such a manneras to effectually seal oil.' the bore 27 from the bore 1. During thisdrilling operation water is fed down through condults 9, 24, 23, 20, and22 and into the well, and thence upwardly to discharge at the top of thewell in the usual manner until the head 14 is seated to seal oi the bore27 as above set forth. When the seating of head 14: has been e'ected thepump 10 is put into operation and the liquid contents of bore 27 israised p to the top of the well. It is obvious that after the mixturemade by the drilling operation has been pumped out the operator willobtain water iowing in from the strata through which the smaller bore 27passes, uncontaminated by water from any other stratum, and consequentlyenabling him to determine positively the quality of the water to beobtained at that point.

It is to be understood, of course, that while we have herein shown anddescribed but one specific embodiment of the invention, changes in form,construction, and method of assembly and operation may be made withinthe scope of the appended claims.

We claim:

1. In a device of the character described, a head member adapted to belowered into a. well and movable into intimate contact with the wall ofthe well tol form a seal, a pair of conduits passing therethrough andextending to the top of the well and closed off from the water in thewell above said head and from each other, a pump mounted in one conduit,a perforated casing depending from said head, a drill mounted on thebottom of said casing, the said casing communicating with the conduit inwhich the pump is mounted, and a conduit mounted Within the casing andcommunicating with the exterior of the drill and with the other of saidfirst mentioned conduits and closed oi from the perforated casing.

2. In a device of the character described, a head member adapted to belowered into a well and movable into intimate contact with the wall ofthe well to form a seal, a pair of conduits, one within the other,seated in each end of said head, a passage connecting the inner conduiton one end of the head with the outer conduit on the other side of thehead, pumping means mounted in a conduit EDWARD HERBERT MCHARDIE.

NATHAN T. BRADFORD.

